化学学报 ›› 2006, Vol. 64 ›› Issue (15): 1601-1605. 上一篇    下一篇

研究论文

石质文物表面生物矿化保护材料的仿生制备

刘强, 张秉坚*

  

  1. (浙江大学化学系 杭州 310027)
  • 收稿日期:2006-01-15 修回日期:2006-03-16 出版日期:2006-08-14 发布日期:2006-08-14
  • 通讯作者: 张秉坚

Bioinspired Preparation of a Protective Biomineralized Material on the Surfaces of Historic Stones

LIU Qiang, ZHANG Bing-Jian*   

  1. (Department of Chemistry, Zhejiang University, Hangzhou 310027)
  • Received:2006-01-15 Revised:2006-03-16 Online:2006-08-14 Published:2006-08-14
  • Contact: ZHANG Bing-Jian

许多濒危石质文物急需进行保护处理. 但是, 调查表明已经使用过的表面防护材料很难令人满意, 探索新的石质文物保护材料已是当务之急. 本工作以石质文物表面天然生成的生物矿化膜为仿生合成目标, 依据生物矿化的原理, 以硫酸软骨素作为有机模板, 草酸钙的亚稳过饱和溶液作为无机前驱物, 室温下在石材表面仿生合成了主要成分为一水草酸钙的无机表面保护材料. 其制备工艺用正交试验进行了优化; 结构和形貌用X射线衍射分析仪和原子力显微镜进行了表征; 通过憎水性、耐污性和耐酸性试验进行了合成膜的保护性能测试, 效果良好. 本方法为开拓新的石质文物保护材料提供了思路.

关键词: 生物矿化膜, 仿生合成, 草酸钙, 石质文物保护

The conservation of historic stones is a crucial and arduous task. Now, stone conservation is primarily achieved through surface treatments by the use of organic materials, but the protective effects do not satisfy the protectors. So it has been focused on to develop new materials or methods. In this paper, we have prepared a new protective material by a bioinspired method, in which chondroitin sulfate was selected as a controlling template and the supersaturated solution of calcium oxalate as a stock solution, and the processing parameters was optimized through orthogonal experiments. The structure and microtopography of protective materials have been analyzed by X-ray diffraction (XRD) and atomic force microscopy (AFM), which indicate that the stone substrate is coated by a film of calcium oxalate about 100 nm thick. Moreover, its protective performances have also been evaluated by its abilities to resist water, soil and acid. The analyses reveal that the protective effects of the film are favorable. The method for stone conservation by biomimetic approach should develop a category of new protective methods or ideas.

Key words: biomineralized film, bioinspired preparation, calcium oxalate, conservation of historic stone